Truck wont start

Tiny
DRCRANKNWRENCH
  • MEMBER
2of3
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
DRCRANKNWRENCH
  • MEMBER
3of3
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
98S10BLAZER
  • MEMBER
  • 1998 CHEVROLET S-10
Engine Mechanical problem
1998 Chevy S-10 6 cyl Two Wheel Drive Automatic 171k miles

Noticed my blaser hard to start during or after the rain. Now it doesnt start after this wknds rain Sat. Trys toTurn over but no "coughing" at all. Sounds like no gas or spark. 2wks ago error code said MAF sensor. I replaced that and disconnected battery. Still wont start. I smell gas after trying to turn it over and hear fuel pump. Removed sparkplug cable from plug in engine. Bought a spark plug and plugged it into cable and tried to start the car. Had spark when I put it close to the engine. Noticed a little corrosion so I cleaned out distrib and rotor. Still wont start. So I smell gas and got spark. Maybe a sensor somewhere not working?
Any suggestions before Im forced to call a tow truck for the shop?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
You got a snapping blue spark and smell fuel-lets do a fuel pressure check to rule out the fuel pump and also check for injection pulses from the injector/s.

Or try this below and tell me what happened

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil, distributor pick-up coil, ignition control module, cam and crank sensors-
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
98S10BLAZER
  • MEMBER
I used starting fluid in thottlebody with and without boot on. The blazer just sputtered tried to kick over jerking and backfiring briefly through the thottlebody and stopped. Could it be a possible egr valve stuck open? Spark was blue gas pressure was 58 to 60 psi on the rail. Good spark and gas pressure. Or could I check something else out?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
98S10BLAZER
  • MEMBER
Can someone please reply to my question. Blazer has not started in 4 days. From previous posts looks like possible issues for not starting are coil, cap/rotor, egr sensor, crank sensor. Cap has some white stuff on metal pins. Cleaned that out and metal piece on top of rotor. Put back on and still wont start. Good spark and gas pressure. Starting fluid in Throttle body with and without boot on just sputters and jerks car around. Backfire through throttle body to. How do you check coil. Could egr be the problem? Was going to locate that somewhere on engine and remove it. Put hand over hole to seal it. Heard egr could stick open and you would have no "vacuum".
What should I try next? Gas pressure at rail 60 to 58psi is that good?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
How do you check coil. You said spark was blue then it should fire up when you hit it with the starting fluid. Are you spraying behind the throttle plate?

The EGR valve is electronic in from of the lower intake plenum.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
PAKKALAC
  • MEMBER
  • 1998 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
I just bought this 1998 s10 and it wont start it just cranks. I've tested fuel pressure, read 60psi which according to haynes repair manual is good. I've also tested for spark which was good. I sprayed starting fluid into the engine and it started for a second but I tried it later again and got nothing. My uncle also plugged in his diagnostic tool and no codes came up. I've also tried to do the passlock relearn, didnt work. I have also replaced the ignition coil, distributor cap, and rotor. Any other suggestions?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
98S10BLAZER
  • MEMBER
Yes just like a carb. Open the flap and squirt the starting fluid inside past the flap. I counted to 3sec. Tried to start with and without boot. Then I squirted to 5sec. And did the same. Blazer just sputtered and backfired through throttle body. Seemed like engine was only burning the starting fluid. The blazer sputtered longer when I pushed peddle down halfway and to floor. If I kept foot off of gas pedal only a few sputters.
Blue spark good gas pressure. Any other suggestions?
What does do? Is it possible the egr is causing a problem? I heard a MAS sensor could be a problem to. To many guesses. Trying to figure out hoe to troubleshoot what when for this issue.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
JDL
  • EXPERT
Hi, if you have the spider fuel system, it may need cleaning. Sometimes the fuel poppets get stuck. Do you have an injector pulse, engine cranking?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
Blue spark good gas pressure. Any other suggestions?

When you hit it with carb cleaner-does it combust for 1sec-if it combust try checking the ignition timing. When push comes to shove open up the upper plenum and investigate the spider unit that's if its a Vortec
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
PAKKALAC
  • MEMBER
I'm not sure if I have the spider fuel system, but ill clean it if I do. Also I dont know if this has anything to do with it but the gas gauge seems glitchy. Sometimes it shows the 3/4 of a tank I put in it. And sometimes it doesnt. It usually shows up 3/4 tank then drops to below e randomly.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
PAKKALAC
  • MEMBER
And once this problem started occuring I did manage to get it started with starting fluid. I'm thinking it may just be "weak spark" because it definitly has spark but maybe its just not enough to get the engine to fire? But I replaced the ignition coil sooo? And also if the plug wires were cracked it doesnt cause weak spark, it causes NO spark right?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
JAYMAN99
  • MEMBER
  • 1998 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • MANUAL
  • 212,000 MILES
My s10 will crank but it will not fire. It is getting fuel but no spark. I just replaced the crank sensor, ingition module, and coil packs and it still will not fire when I crank it over. I dont what it could be? The fuses are all good too.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
What kind of ignition system do you have? When checking for spark are you grounding it out to a good CLEAN tight ground?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
JDL
  • EXPERT
A weak spark could be an issue? When you said it ran with starter fluid, it made me think it is something with the fuel system. If you test for spark and it is a snapping blue spark, that sounds strong to me. If you have a noid lite, you can check for injector pulse?
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
JAYMAN99
  • MEMBER
The ignition system it has is an ignition module with the coil packs and thats it. It does not have a distributor. I did put it on a clean ground. It started by not firing on 2 of the 4 cylinders and then I bought a new ingition module and it wont fire. So I bought another new ignition module and it still wont fire. I changed the coil packs and did nothing to fix it. I then changed the crank sensor and still the same. I have no idea what to change next.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
PAKKALAC
  • MEMBER
No it wasn't blue it was red/orange. So that means I have a weak spark? I just replaced the ignition coil though.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
Woah! Beore changing all t hese things lets get to testing?

Take the harness of of the ignition coils. From there check to see if you get a +12v on one terminall of each coil with key on. Then with engine cranking see if you get a -12v pulsing on the other side of the coil.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)
Tiny
JDL
  • EXPERT
I'd still want to check injector pulse. Did you use a spark tester? Some of them testers, you can open the gap, if spark will jump the gap, I don't care what color the spark, sounds strong to me. If you used a spark plug to test for spark and it was fuel contaminated, I'm not sure what color it might be?

Just to add, if you break the side electrode off a known good spark plug and the spark will jump from center electrode to side of plug, the spark should be strong enough.
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Saturday, March 30th, 2019 AT 12:53 PM (Merged)

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